---
---
<!doctype html>
<html lang="{{ page.lang | default: site.lang | default: "en" }}">
  {% include head.html %}
  <body>
    <div id="main" class="container">

      {% include header.html %}

      <main>
        {{ content }}
      </main>

    </div>
    {% include footer.html %}

    {% if page.mathjax %}
      {% include mathjax.html %}
    {% endif %}
    
    {% if page.katex %}
      {% include katex.html %}
    {% endif %}
    
    {% if jekyll.environment == 'production' and site.google_analytics %}
      {% include google-analytics.html %}
    {% endif %}
  </body>
</html>
